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Spaceflight Validation of Hzetrn Code (1999)

Author: Wilson, J. W.; Shinn, J. L.; Singleterry, R. C.; Badavi, F. F.; Badhwar, G. D.; Reitz, G.; Beaujean, R.; Cucinotta, F. A
Subject: ELECTRIC PROPULSION; THERMOCOUPLES; DATA ACQUISITION; COOLING SYSTEMS; HALL THRUSTERS; DAMPING; THRUST MEASUREMENT; SYSTEMS ENGINEERING; TEMPERATURE CONTROL; MECHANICAL ENGINEERING; VERTICAL MOTION; PENDULUMS; PANELS; DISPLACEMENT
Year: 1999
Language: English
Book contributor: NASA
Collection: nasa_techdocs

Description

HZETRN is being developed as a fast deterministic radiation transport code applicable to neutrons, protons, and multiply charged ions in the space environment. It was recently applied to 50 hours of IMP8 data measured during the August 4, 1972 solar event to map the hourly exposures within the human body under several shield configurations. This calculation required only 18 hours on a VAX 4000 machine. A similar calculation using the Monte Carlo method would have required two years of dedicated computer time. The code has been benchmarked against well documented and tested Monte Carlo proton transport codes with good success. The code will allow important trade studies to be made with relative ease due to the computational speed and will be useful in assessing design alternatives in an integrated system software environment. Since there are no well tested Monte Carlo codes for HZE particles, we have been engaged in flight validation of the HZETRN results. To date we have made comparison with TEPC, CR-39, charge particle telescopes, and Bonner spheres. This broad range of detectors allows us to test a number of functions related to differing physical processes which add to the complicated radiation fields within a spacecraft or the human body, which functions can be calculated by the HZETRN code system. In the present report we will review these results.

Creative Commons license: Public Domain

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Identifier:	nasa_techdoc_20040086491
Document-source:	CASI
Documentid:	20040086491
Nasa-center:	Johnson Space Center; Langley Research Center
Online-source:	http://wayback.archive-it.org/1792/20100129064247/http://hdl.handle.net/2060/20040086491
Original-nasa-rights:	Unclassified; No Copyright; Unlimited; Publicly available;
Report-number:	AIAA Paper 2004-3441
Updated-added-to-ntrs:	2008-06-02
Licenseurl:	http://creativecommons.org/licenses/publicdomain/
Mediatype:	texts
Rights:	Public Domain
Identifier-access:	http://www.archive.org/details/nasa_techdoc_20040086491
Identifier-ark:	ark:/13960/t00z8284t
Ppi:	300
Ocr:	ABBYY FineReader 8.0